saeedmns68
Junior Member level 1
Problem with IR2153 high side
Im making a half bridge 300v 14khz square wave power supply by using two ultra fast IGBTs and a IR2153 gate driver,when the power part of the circuit is inacvtive(Vcc=0 V) the gate-emitter waveform on high side IGBT is good with peak to peak voltage of VGE=11200mV , but when the power is activated and no load is at the output of the circuit(IC=0) the waveform will contain high frequency noise with 7000mV mixed with original waveform VPP=11.3V.bmp peak to peak ,the power supply of high and low side VGE is two isolated L7812CV output,what can be wrong in my circuit?pls help me
View attachment VGE HIGH AFTER CONNECTING POWER VPP=18.5.bmp
Im making a half bridge 300v 14khz square wave power supply by using two ultra fast IGBTs and a IR2153 gate driver,when the power part of the circuit is inacvtive(Vcc=0 V) the gate-emitter waveform on high side IGBT is good with peak to peak voltage of VGE=11200mV , but when the power is activated and no load is at the output of the circuit(IC=0) the waveform will contain high frequency noise with 7000mV mixed with original waveform VPP=11.3V.bmp peak to peak ,the power supply of high and low side VGE is two isolated L7812CV output,what can be wrong in my circuit?pls help me
View attachment VGE HIGH AFTER CONNECTING POWER VPP=18.5.bmp